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US 4,318,773 AGranted
Process for the concentration of solutions with simultaneous setting
AssigneeBayer Aktiengesellschaft
InventorsMartin Ullrich, Manfred Hederich, Karl-Friedrich Jerchel
Life of this patent
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Abstract
Liquid solutions are evaporated to their setting points and the set material so formed is crushed in a screw machine. The phase conversion from the still viscous state to the flowable crushed solid state is carried out in a single closed housing zone of the screw machine and comprises simultaneous evaporation, setting, crushing and further concentration.
Claims11
A process for the continuous concentration of liquid solutions, comprising the steps of:
- providing a screw evaporator with a closed housing zone having a discharge outlet;
- feeding a liquid solution into the screw evaporator;
- concentrating the liquid solution by evaporation in the closed housing zone;
- converting the liquid solution into the solid phase by further concentration in the closed housing zone;
- crushing the solid phase into a flowable solid material in the closed housing zone;
- conveying the vapors released during the concentrating, converting and crushing steps with the material unidirectionally towards the discharge outlet;
- and
- discharging the vapors along with the crushed solid material from the same discharge outlet of the closed housing zone.
5 more elements
Dependencies are inferred from the claim text.